Method and system for measuring electrical runout of steam turbine rotor, storage medium and electronic equipment

Abstract

The invention discloses a steam turbine rotor electrical jump measurement method and system, a storage medium and electronic equipment. The measurement method comprises the steps that a mechanical jump signal and a comprehensive jump signal of a rotor in the rotation process are acquired through a data acquisition module; the phase synchronization control module transmits the obtained rotor phase signal to the data acquisition module and synchronously calibrates the rotor phase with the obtained mechanical bounce signal and the comprehensive bounce signal; transmitting the mechanical jerk value, the comprehensive jerk value and the rotor phase signal to a signal processing module for processing through a data acquisition module to obtain the comprehensive jerk value and the mechanical jerk value of the rotor, and performing phase registration on the mechanical jerk value and the comprehensive jerk value; and calculating the obtained comprehensive jerk value and the mechanical jerk value through a signal processing module to obtain an electrical jerk value, and outputting a phase diagram. According to the invention, the mechanical jerk value and the comprehensive jerk value can be measured simultaneously, quickly and precisely, and the electrical jerk value and the phase of each jerk value can be obtained through analysis and calculation.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and in particular to a method, a system, a storage medium and an electronic device for measuring the electrical runout of a steam turbine rotor. Background Art

[0002] The steam turbine is a prime mover that converts the thermal energy of steam or gas into mechanical energy for the rotation of the turbine rotor. The vibration and noise generated by the turbine rotor during operation directly affect the operational reliability of the turbine. The turbine rotor includes the main shaft, impeller, moving blades and couplings. It is a key component in the turbine and provides a guarantee for the energy conversion of the turbine. Due to the inevitable machining errors in the production and manufacturing process of the turbine rotor, there is radial circular runout on its cross section when the turbine rotor rotates around the main shaft. In industry, eddy current sensors are usually used to detect the radial circular runout of the turbine rotor. This runout is called total runout or comprehensive runout. The comprehensive runout consists of two parts. One part is the mechanical runout caused by the machining errors during the machining process, which mainly reflects the non-circularity and coaxiality of the shaft; the other part is the electrical runout caused by the uneven electromagnetic distribution of the turbine rotor surface after complex surface treatment processes such as high-temperature forging and laser cladding. Mechanical runout is defined as the difference between the maximum and minimum values ​​of the mechanical surface profile measured on the measuring section relative to the main shaft during one rotation of the turbine rotor around the main shaft without axial movement; correspondingly, electrical runout refers to the difference between the maximum and minimum readings of the characteristic changes such as electromagnetic and stress measured on the measuring section during one rotation of the turbine rotor around the main shaft without axial movement. The high-precision measurement of rotor runout is mainly completed by eddy current sensors, but the runout measured by the sensor is a comprehensive runout, which consists of mechanical runout and electrical runout. In general, the problem of synchronous measurement of mechanical runout and electrical runout is not considered, that is, it is believed that the electrical runout can be obtained by subtracting the difference between the maximum and minimum readings of the mechanical runout from the comprehensive runout, and only the problem of high-precision measurement of mechanical runout needs to be solved.

[0003] In the prior art, there are two main methods for measuring the mechanical runout of the rotor. The first is to use a mechanical gauge for measurement. Traditional mechanical gauges include dial gauges and micrometers, where the readings of the micrometer can reach the μm level. However, since the measuring head of this mechanical gauge is a spherical surface and cannot contact the smallest contour of the workpiece surface, the data obtained during the actual measurement process is not accurate, so the accuracy level of this measurement method cannot reach the μm level. The second is an electric measuring instrument measurement method based on a displacement sensor. After the electric measuring instrument obtains the analog quantity through the displacement sensor, it is converted into a digital quantity for display, that is, the measured signal is converted into changes in resistance, capacitance, inductance, etc., and an electrical signal output is generated, which is amplified and displayed by a computer. The probe used by the electric measuring instrument is also a contact probe. After contacting the surface of the workpiece, the displacement change of the probe is converted into an electrical signal input into the system and displayed on the panel. Since the contact probe used by the electric measuring instrument has a sharper top, it can, to a certain extent, solve the problem that the traditional mechanical measuring instrument cannot accurately express the contour changes on the surface of the part. However, it cannot collect data through a data acquisition card, that is, it cannot become a component of an integrated electrical runout detection instrument. It is only suitable for the rapid detection of the form and position tolerances of processed parts.

[0004] In addition, the Chinese invention patent with patent number "ZL202011109820.6" and name "A centrifugal compressor high-speed rotor residual electrical runout detection device and method" specifically discloses "including a mounting frame, a placement mechanism, a detection mechanism, and a control panel. The placement mechanism, the detection mechanism, and the control panel are installed on the mounting frame. The placement mechanism includes mounting plate two, mounting plate three, guide wheel one, guide wheel two, guide wheel three, and guide wheel four. Mounting plate two and mounting plate three are vertically arranged on the mounting frame. When the rotor rotates, the detection mechanism can perform residual electrical runout detection on the rotor. When the rotor rotates between guide wheel one and guide wheel two, guide wheel three and guide wheel four, the sensor emits a signal and transmits it to the detection board, and then the detection board feeds the signal back to the sensor. The electromagnetic field generated at the end of the rotor is transmitted to the detection board, thereby eliminating the interference of the electromagnetic field generated at the end of the rotor with the electromagnetic field fed back by the sensor". The device obtains the electrical runout based on the difference between the conductivity and magnetism of the probe tip and the end material of the eddy current detection probe. However, the detection device does not take into account that the eddy current sensor actually measures the comprehensive runout including the mechanical runout. The electrical runout can only be obtained after the deviation caused by the mechanical runout is eliminated. Therefore, the detection device has significant defects. From the practical application level, the existing steam turbine rotor electrical runout measurement devices only support real-time data reading, but cannot output a complete detection report of the 360° angular phase, which is not convenient for data management and reduces the detection efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the technical problem to be solved by the present invention is to provide a method, a measuring system, a storage medium and an electronic device for measuring the electrical runout of a steam turbine rotor, which can simultaneously, quickly and accurately measure the mechanical runout and the comprehensive runout of the rotor, and calculate the electrical runout and the extreme values ​​of each runout and the phases of the extreme values ​​through computer analysis and calculation, and output a 360° mechanical runout, electrical runout and comprehensive runout phase diagram of the rotor.

[0006] A first aspect of the present invention provides a method for measuring electrical runout of a steam turbine rotor, comprising:

[0007] The mechanical jitter signal and the comprehensive jitter signal of the rotor during rotation are acquired through the data acquisition module; the phase synchronization control module acquires the phase signal identified during the rotation of the rotor, and transmits the phase signal to the data acquisition module; the rotor phase is calibrated synchronously with the phase signal and the acquired mechanical jitter signal and the comprehensive jitter signal; the mechanical jitter amount, the comprehensive jitter amount and the rotor phase signal are transmitted to the signal processing module for processing through the data acquisition module to acquire the comprehensive jitter amount and the mechanical jitter amount of the rotor, and the mechanical jitter amount and the comprehensive jitter amount are phase-aligned; the acquired comprehensive jitter amount and the mechanical jitter amount are calculated by the signal processing module to obtain the electrical jitter amount, and a 360° mechanical jitter, electrical jitter and comprehensive jitter phase diagram of the rotor is output.

[0008] Preferably, a striped belt with scale is provided on the rotor, and a magnet is provided at the joint of the striped belt; the phase synchronization control module includes a phase trigger unit and a phase identification unit, the phase trigger unit obtains a trigger signal through the magnet, the phase identification unit identifies the striped belt to obtain a phase signal, and transmits the trigger signal and the phase signal to the data acquisition module to synchronize with the mechanical beat signal and the comprehensive beat signal to calibrate the rotor phase.

[0009] Preferably, in the process of acquiring the mechanical beating signal and the comprehensive beating signal, the mechanical beating signal and the comprehensive beating signal on the same section of the rotor are acquired through the data acquisition module; or, the mechanical beating signal and the comprehensive beating signal on parallel sections of the rotor are acquired through the data acquisition module.

[0010] Preferably, the signal processing module includes a first processing unit and a second processing unit, the first processing unit preprocesses the mechanical jitter signal, and the second processing unit preprocesses the comprehensive jitter signal, and the preprocessing results are processed by a signal processing algorithm to obtain the comprehensive jitter amount and the mechanical jitter amount.

[0011] Preferably, the signal processing module further comprises a third processing unit, and the preprocessing result is transmitted to the third processing unit, and the third processing unit completes the phase alignment of the mechanical jump and the comprehensive jump through a matching algorithm, thereby obtaining the electrical jump amount.

[0012] Preferably, based on the same cross-section measurement process, when the rotor rotates at a uniform speed, the phase difference between the mechanical runout and the comprehensive runout is calculated and compensated through a data matching optimization algorithm; when the rotor rotates at a non-uniform speed, the phase synchronization control module is used to record the phase and compensate for the phase difference between the mechanical runout and the comprehensive runout.

[0013] A second aspect of the present invention provides a system for measuring the electrical runout of a steam turbine rotor, wherein the system uses the measurement method described in any one of the first aspects to measure the electrical runout, and the system includes a data acquisition module for acquiring a mechanical runout signal and a comprehensive signal of the rotor during rotation, a phase synchronization control module for identifying a phase signal of the rotor during rotation, and a signal processing module for calculating the electrical runout amount, wherein the phase synchronization control module, the data acquisition module and the signal processing module are connected in sequence.

[0014] Preferably, the data acquisition module includes a first detection unit for detecting a mechanical beat signal, a second detection unit for detecting a comprehensive beat signal and a rotatable clamping device, the first detection unit and the second detection unit are arranged on the clamping device, and the clamping device drives the first detection unit and the second detection unit to change the measurement posture.

[0015] Preferably, the first detection unit and the second detection unit are arranged at a certain angle, and both are arranged along the normal direction of the same measurement surface.

[0016] Preferably, the first detection unit and the second detection unit are installed along a normal direction parallel to a measurement surface.

[0017] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the measurement method described in any one of the first aspects of the present invention.

[0018] A fourth aspect of the present invention provides an electronic device, comprising a memory storing a computer program; a processor communicatively connected to the memory, and executing any measurement method described in the first aspect of the present invention when calling the computer program.

[0019] As described above, the method for measuring the electrical runout of a steam turbine rotor according to the present invention has the following beneficial effects:

[0020] The measuring method measures and obtains the mechanical jitter signal and the comprehensive jitter signal of the rotor during rotation through the data acquisition module at the same time, and obtains the rotor phase signal through the phase synchronization control module at the same time, and calibrates the rotor phase under the joint action of the data acquisition module and the phase synchronization control module. The rotor phase signal, the comprehensive jitter amount and the mechanical jitter amount are processed by the signal processing module to achieve the registration of the comprehensive jitter amount and the mechanical jitter amount with the rotor phase signal, and finally the charged electrical jitter amount is calculated by the signal processing module. The present invention can simultaneously, quickly and accurately measure the mechanical jitter amount and the comprehensive jitter amount of the rotor, and at the same time obtain the electrical jitter amount and the phase of each jitter amount through analysis and calculation, and output the phase diagram corresponding to the mechanical jitter amount, electrical jitter amount and comprehensive jitter amount of the rotor for 360°, which can intuitively display the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic flow chart of a method for measuring electrical runout of a steam turbine rotor provided in accordance with an embodiment of the present invention.

[0022] Figure 2 A schematic diagram of a steam turbine rotor electrical runout measurement system provided in one embodiment of the present invention.

[0023] Figure 3 Schematic diagram of the stripe.

[0024] Figure 4 Schematic diagram of synchronous measurement based on the same cross section.

[0025] Figure 5 Schematic diagram of synchronous measurement based on parallel sections.

[0026] Figure 6 A side view of a clamping device provided for an embodiment of the measurement system described in the present invention.

[0027] Figure 7 A top view of a clamping device provided in accordance with an embodiment of the measuring system of the present invention.

[0028] Figure 8 This is the effect diagram of the Fourier series fitting processing of mechanical vibration.

[0029] Fig. 9 This is a diagram showing the effect of the comprehensive beating Fourier series fitting processing.

[0030] Fig.10 It is a schematic diagram of the structure of the electronic device of the present invention in a specific embodiment.

[0031] Description of reference numerals:

[0032] 100, phase synchronization control module; 110, phase trigger unit; 120, phase identification unit; 130, transmitting end unit; 140, receiving unit; 200, data acquisition module; 210, first detection unit; 220, second detection unit; 230, signal conditioning unit; 240, data acquisition unit; 300, signal processing module; 310, first processing unit; 320, second processing unit; 330, third processing unit; 400, clamping device; 410, base; 420, supporting part; 430, fixing part; 500, electronic device; 510, memory; 520, processor; 600, stripe belt. DETAILED DESCRIPTION

[0033] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0035] The present invention provides an embodiment of a method for measuring the electrical runout of a steam turbine rotor. The rotor to be tested needs to be fixed on a machine tool and the preparatory work before the measurement is completed. The measurement specifically includes:

[0036] S100, such as Figure 1 As shown, the mechanical beating signal and the comprehensive beating signal of the rotor during rotation are obtained through the data acquisition module 200, the phase signal identified during the rotor rotation is obtained through the phase synchronization control module 100, and the phase signal of the rotor is transmitted to the data acquisition module 200 through wireless communication. It should be noted that there is no sequence between obtaining the rotor mechanical beating signal, the comprehensive beating signal and the phase signal, that is, the detection and acquisition of the mechanical beating signal, the comprehensive beating signal and the phase signal are completed synchronously.

[0037] Furthermore, if Figure 1-Figure 3As shown, in order to quickly obtain the phase signal of the rotor during the rotation process, a scaled stripe belt 600 is required to be provided on the rotor. The stripes on the stripe belt 600 are arranged in black and white, and the stripe belt 600 is arranged around the rotor. A magnet is provided at the joint of the stripe belt 600. The magnet is used to fix the stripe belt 600 on the one hand, and on the other hand, it serves as the starting point and end point of the rotor rotation calculation. An interval digital scale is provided on one side of the stripe to indicate the phase of the rotor rotation. The stripe interval is determined according to the phase accuracy required to be resolved. The black and white stripes on the stripe belt 600 can be identified by the phase identification unit 120. Phase synchronization control module 100, the phase synchronization control module 100 includes a phase trigger unit 110, a phase identification unit 120, a transmitting end unit 130 and a receiving end unit 140. The phase trigger unit 110 and the phase identification unit 120 are connected to the transmitting end unit 130, and the transmitting end unit 130 is connected to the receiving end unit 140. During measurement, when the rotor is rotating, the phase trigger unit 110 senses the magnet on the stripe belt 600 through the Hall sensor to obtain a trigger signal. The phase trigger unit 110 transmits the trigger signal to the transmission end unit 130, and then transmits it to the receiving end unit 140 through wireless communication. The phase identification unit 120 identifies the black and white stripes of the striped belt 600 during the rotation of the rotor to obtain a phase signal, and transmits the phase signal to the transmission end unit 130, and then transmits it to the receiving end unit 140 through wireless communication, thereby completing the acquisition of the mechanical beating signal, the comprehensive beating signal and the phase signal. Among them, the phase identification unit 120 is preferably a color sensor. During detection, the Hall sensor is aligned with the magnet, the phase identification unit is aligned with the striped belt 600, and the rotor is rotated. When the Hall sensor senses the magnet, the phase identification unit starts to count the black and white stripes on the striped belt 600, and at the same time transmits the count representing the phase to the receiving end unit 140, and the receiving end unit 140 transmits the count value representing the phase to the data acquisition module 200 for processing.

[0038] Furthermore, if Figure 4 and Figure 5As shown, the data acquisition module 200 includes a first detection unit 210 and a second detection unit 220, the first detection unit 210 is used to detect the mechanical beating signal, and the second detection unit 220 is used to detect the comprehensive beating signal. The first detection unit 210 is preferably a mechanical displacement sensor, and the second detection unit 220 is preferably an eddy current sensor. In order to meet the use requirements of different application scenarios, in the process of obtaining the mechanical beating signal and the comprehensive beating signal, the first detection unit 210 and the second detection unit 220 can be used to synchronously detect the rotor mechanical beating signal and the comprehensive beating signal along the radial direction of the same section, thereby avoiding theoretical errors and saving axial space, and being suitable for measuring a specific section of a steam turbine rotor with a short axial distance; or, the first detection unit 210 and the second detection unit 220 can be used to synchronously detect the rotor mechanical beating signal and the comprehensive beating signal along the radial direction based on parallel sections, and the first detection unit 210 and the second detection unit 220 are simple to install and have high precision, and are suitable for rotors with a long axial distance. It should be noted that when the mechanical runout signal and the integrated runout signal are measured synchronously on the same cross section, the angle between the first detection unit 210 and the second detection unit 220 is θ, and the angle θ is preferably 0° to 180° for easy measurement.

[0039] S200, such as Figure 2 As shown, the receiving end unit 140 is connected to the data acquisition module 200, and the receiving end unit 140 transmits the acquired mechanical beat signal, comprehensive beat signal and phase signal to the data acquisition module 200, and the data acquisition module 200 synchronizes the phase signal with the acquired mechanical beat signal and comprehensive beat signal to calibrate the rotor phase.

[0040] Specifically, the data acquisition module 200 further includes a signal conditioning unit 230 and a data acquisition unit 240. The first detection unit 210 and the second detection unit 220 are connected to the signal conditioning unit 230. The signal conditioning unit 230 is connected to the data acquisition unit 240. The data acquisition unit 240 is connected to the receiving end unit 140. The analog electrical signals acquired by the first detection unit 210 and the second detection unit 220 are processed by the signal conditioning unit 230 and then transmitted to the data acquisition unit 240. At the same time, the receiving end unit 140 transmits the acquired rotor phase signal (i.e., the count value representing the phase) to the data acquisition unit 240. The data acquisition unit 240 is connected to a computer, and the phase signal is paired with the mechanical beating signal detected by the first detection unit 210 and the comprehensive beating signal detected by the second detection unit 220 through the computer to obtain the values ​​of the mechanical beating and comprehensive beating corresponding to different phases of the rotor.

[0041] S300, such as Figure 2As shown, the mechanical runout, comprehensive runout and rotor phase signal are transmitted to the signal processing module 300 for processing through the data acquisition module 200, the comprehensive runout and mechanical runout of the rotor are calculated, and the mechanical runout and the comprehensive runout are phase-aligned.

[0042] Specifically, the signal processing unit 300 includes a first processing unit 310, a second processing unit 320 and a third processing unit 330. The first processing unit 310 and the second processing unit 320 are both connected to the third processing unit 330. The first processing unit 310 performs signal preprocessing such as digital filtering on the mechanical jitter signal input into the data acquisition module 200. The second processing unit 320 performs signal preprocessing such as digital filtering on the comprehensive jitter signal input into the data acquisition module 200. The preprocessing result is obtained by a signal processing algorithm to obtain a comprehensive jitter amount and a mechanical jitter amount. On the one hand, the preprocessing result is provided to the signal processing algorithm for processing to obtain the comprehensive jitter amount and the mechanical jitter amount of the rotor; on the other hand, the preprocessing result is provided to the third processing unit to complete the phase alignment of the mechanical jitter and the comprehensive jitter through a phase matching algorithm. It should be noted that, Figure 8 and Fig. 9 As shown, during the preprocessing process performed by the first processing unit 310 and the second processing unit 320, the preprocessing is completed by fitting a 6-level Fourier series, so that high-frequency noise can be removed. The phase matching algorithm is preferably but not limited to the least squares circle algorithm.

[0043] S400, the obtained comprehensive runout and mechanical runout are calculated by the signal processing module 300 to obtain the electrical runout, and a phase diagram of the mechanical runout, electrical runout and comprehensive runout of the rotor for 360° is output, and the phase diagram can be displayed on a display screen.

[0044] It should be emphasized that in the same cross-section measurement process, since there is a phase difference between the mechanical runout and the comprehensive runout during measurement, it is necessary to separate the electrical runout from the comprehensive runout through certain signal processing means. When the rotor rotates at a uniform speed, the data matching optimization algorithm provided by the first processing unit 310 and the second unit 320 is used to calculate and compensate for the phase difference between the two sets of data, the mechanical runout and the comprehensive runout. When the rotor rotates at a non-uniform speed, the phase difference between the mechanical runout and the comprehensive runout is recorded by the phase synchronization control module 100, that is, the phase is recorded based on the previous fringe method and the phase difference between the two sets of data is compensated.

[0045] After the phase difference is compensated by the first processing unit 310 and the second unit 320, the mechanical jitter and the comprehensive jitter data are transmitted to the third processing unit 330, thereby obtaining the mechanical jitter and the comprehensive jitter data without phase difference. The third processing unit 330 removes the mechanical jitter from the comprehensive jitter, that is, the comprehensive jitter minus the mechanical jitter of the same phase is obtained to obtain the electrical jitter of the same phase.

[0046] Table 1

[0047] Experiment No. Mechanical runout(μm) Comprehensive runout(μm) Electrical runout(μm) 1 7.3 6.22 4.52 2 7.7 6.44 3.53 3 8.4 6.50 5.23 4 7.7 5.28 3.80 5 6.8 5.92 3.88 average value 7.58 6.07 4.20 Standard Deviation 0.53 0.45 0.61

[0048] Table 2

[0049] Experiment No. Mechanical runout(μm) Comprehensive runout(μm) Electrical runout(μm) 1 7.4 6.28 6.1 1 2 7.6 6.85 5.73 3 7.8 6.21 5.98 4 5.7 5.54 5.12 5 6.6 6.35 5.55 average value 7.02 6.24 5.70 Standard Deviation 0.78 0.42 0.35

[0050] The data in Table 1 and Table 2 are the measurement results based on the synchronous measurement of parallel sections by the above-mentioned measurement method. The present invention can measure the mechanical runout and comprehensive runout of the same phase during the rotation of the rotor with high precision, and then obtain the electrical runout with high precision.

[0051] Based on the above description of the measurement method, the present invention provides a measurement system for the electrical runout of a steam turbine rotor. The measurement system uses the above measurement method to measure the electrical runout. Figure 2 As shown, the measurement system includes a data acquisition module 200 for acquiring a mechanical beating signal and a comprehensive beating signal of the rotor during rotation, a phase synchronization control module 100 for identifying a phase signal of the rotor during rotation, and a signal processing module 300 for calculating an electrical beating amount. The phase synchronization control module 100, the data acquisition module 200, and the signal processing module 300 are connected in sequence.

[0052] In one embodiment, if Figure 6 and Figure 7 As shown, the data acquisition module includes a first detection unit 210 for detecting a mechanical beat signal, a second detection unit 220 for detecting a comprehensive beat signal, and a rotatable clamping device 400. The first detection unit 210 and the second detection unit 220 are arranged on the clamping device 400, and the clamping device 400 drives the first detection unit 210 and the second detection unit 220 to change the measurement posture.

[0053] Furthermore, if Figure 6 and Figure 7As shown, the clamping device 400 includes a base 410, a support portion 420 and a fixing portion 430. The base 410 is fixed to a driving device, and the base 410 is driven to rotate by the driving device. One end of the support portion 420 is detachably fixed to the base 410, and the other end of the support portion 420 is provided with a fixing portion 430. The fixing portion 430 is provided with a first detection unit 210 and a second detection unit 220. The first detection unit 210 and the second detection unit 220 are installed along the normal direction of the parallel measurement surface.

[0054] When in use, the driving device can drive the base 410 to move axially, and then drive the probes of the first detection unit 210 and the second detection unit 220 to abut against the position to be measured on the rotor. On the other hand, when it is necessary to apply mechanical runout and comprehensive runout based on the same cross-section measurement, the driving device drives the base 410 to rotate the preset angle α, so that the probes of the first detection unit 210 and the second detection unit 220 are perpendicular to the measurement base surface; when it is necessary to apply mechanical runout and comprehensive runout based on parallel cross-section measurement, the driving device drives the base 410 to rotate the preset angle β, so that the probes of the first detection unit 210 and the second detection unit 220 are parallel to each other and perpendicular to the base surface to be measured. The parallel cross-section measurement posture and the same cross-section measurement posture are converted to each other to meet the measurement of rotor electrical runout at different axial distances.

[0055] Based on the above description of the measurement method, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor. Figure 1 Measurement method shown.

[0056] Based on the above description of the measuring method, the present invention also provides an electronic device, such as Fig.10 As shown, in one embodiment of the present invention, the electronic device 500 includes a memory and a processor 520. The memory 510 stores a computer program, and the processor 520 is in communication with the memory 510. When the computer program is called, the processor 520 executes Figure 1 Measurement method shown.

[0057] In summary, the present invention can simultaneously, quickly and accurately measure the mechanical runout and comprehensive runout of the rotor, and at the same time obtain the electrical runout and the phase of each runout through analysis and calculation, and output the phase diagram corresponding to the mechanical runout, electrical runout and comprehensive runout of the rotor for 360°, which can intuitively display the measurement results.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for measuring electrical runout of a steam turbine rotor, characterized in that: include: The mechanical jitter signal and the comprehensive jitter signal of the rotor during rotation are acquired through the data acquisition module; the phase signal identified during the rotation of the rotor is acquired through the phase synchronization control module, and the phase signal is transmitted to the data acquisition module; the rotor phase is calibrated synchronously with the phase signal and the acquired mechanical jitter signal and the comprehensive jitter signal; the mechanical jitter amount, the comprehensive jitter amount and the rotor phase signal are transmitted to the signal processing module for processing through the data acquisition module to acquire the comprehensive jitter amount and the mechanical jitter amount of the rotor, and the mechanical jitter amount is phase-aligned with the comprehensive jitter amount; the acquired comprehensive jitter amount and the mechanical jitter amount are calculated by the signal processing module to obtain the electrical jitter amount, and a phase diagram of the mechanical jitter amount, the electrical jitter amount and the comprehensive jitter amount of the rotor for 360° is output.

2. The method for measuring the electrical runout of a steam turbine rotor according to claim 1, characterized in that: A striped belt with scale is provided on the rotor, and a magnet is provided at the joint of the striped belt; the phase synchronization control module includes a phase trigger unit and a phase identification unit, the phase trigger unit obtains a trigger signal through the magnet, the phase identification unit identifies the striped belt to obtain a phase signal, and transmits the trigger signal and the phase signal to the data acquisition module to calibrate the rotor phase synchronously with the mechanical beating signal and the comprehensive beating signal.

3. The method for measuring the electrical runout of a steam turbine rotor according to claim 1 or 2, characterized in that: In the process of acquiring the mechanical beating signal and the comprehensive beating signal, the mechanical beating signal and the comprehensive beating signal on the same section of the rotor are acquired through the data acquisition module; or, the mechanical beating signal and the comprehensive beating signal on parallel sections of the rotor are acquired through the data acquisition module.

4. The method for measuring the electrical runout of a steam turbine rotor according to claim 3, characterized in that: Based on the same cross-section measurement process, when the rotor rotates at a uniform speed, the phase difference between the mechanical runout and the comprehensive runout is calculated and compensated through the data matching optimization algorithm; when the rotor rotates at a non-uniform speed, the phase synchronization control module is used to record the phase and compensate for the phase difference between the mechanical runout and the comprehensive runout.

5. The method for measuring the electrical runout of a steam turbine rotor according to claim 1, characterized in that: The signal processing module includes a first processing unit and a second processing unit. The first processing unit pre-processes the mechanical jitter signal, and the second processing unit pre-processes the comprehensive jitter signal. The pre-processing result is processed by a signal processing algorithm to obtain a comprehensive jitter amount and a mechanical jitter amount.

6. The method for measuring the electrical runout of a steam turbine rotor according to claim 5, characterized in that: The signal processing module also includes a third processing unit, and the preprocessing result is transmitted to the third processing unit. The third processing unit completes the phase alignment of the mechanical jump and the comprehensive jump through a matching algorithm, and then calculates the electrical jump amount.

7. A system for measuring electrical vibration of a steam turbine rotor, characterized in that: The measuring system adopts the measuring method of claims 1-6 to measure electrical jitter. The measuring system includes a data acquisition module for acquiring mechanical jitter signals and comprehensive jitter signals of the rotor during rotation, a phase synchronization control module for identifying phase signals of the rotor during rotation, and a signal processing module for calculating the electrical jitter amount. The phase synchronization control module, the data acquisition module and the signal processing module are connected in sequence.

8. The steam turbine rotor electrical runout measurement system according to claim 7, characterized in that: The data acquisition module includes a first detection unit for detecting a mechanical beat signal, a second detection unit for detecting a comprehensive beat signal, and a rotatable clamping device. The first detection unit and the second detection unit are arranged on the clamping device, and the clamping device drives the first detection unit and the second detection unit to change the measurement posture.

9. The steam turbine rotor electrical runout measurement system according to claim 8, characterized in that: The first detection unit and the second detection unit are installed along a normal direction parallel to a measurement surface.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the measurement method according to any one of claims 1 to 6 is implemented.

11. An electronic device, characterized in that: The electronic device comprises: A memory storing a computer program; A processor is communicatively connected to the memory, and executes the measurement method according to any one of claims 1 to 6 when calling the computer program.

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